lab.cpp

////////////////////////////////////////////////////////////
// Author: Daniel Heppner
// Class:  CSCI140
// Assignment: Lab 7
// Program Description: Generate 100 random numbers, then allow the user to sort them in ascending or descending order.
//   Input: Menu options, a-d or A-D
//   Processing: For each item in the array, there is a loop that checks every other item in the array to see if it is greater or less than the item. If greater/less than, it is swapped. 
//   Output: Displays the array after processing has occured. 
///////////////////////////////////////////////////////////

#include <iostream>
#include <cstdlib>
#include <ctime>

void displayMenu(int randoms[]);
void output(int randoms[]);
void sortGreatToSmall(int randoms[]);
void sortSmallToGreat(int randoms[]);

using namespace std;
int main() {
    int randoms[100];
    
    srand( (unsigned) time(NULL)); // Seed our random number gen
    
    cout << "Generating random numbers..." << endl;
    for(int i = 0; i < 100; i++) {
        randoms[i] = ( rand() % 20 ) + 1;
    }

    output(randoms);
    
    displayMenu(randoms);
}

// Display a menu 
void displayMenu(int randoms[]) {
    char choice; 

    cout << endl;
    cout << "------------- Options -------------" << endl;
    cout << "| A) Do not sort; output as is.   |" << endl;
    cout << "| B) Sort greatest to smallest    |" << endl;
    cout << "| C) Sort smallest to greatest    |" << endl;
    cout << "| D) Exit                         |" << endl;
    cout << "-----------------------------------" << endl;
    cout << "Enter your choice: ";
    cin >> choice;
    
    switch (choice) {
        case 'A':
        case 'a': output(randoms);
                  displayMenu(randoms);
                  break;
        case 'B': 
        case 'b': sortGreatToSmall(randoms);
                  break;
        case 'C': 
        case 'c': sortSmallToGreat(randoms);
                  break;
        case 'D': 
        case 'd': break;
        default: displayMenu(randoms);
    }
}

// Display the array of random number
void output(int randoms[]) {
    cout << endl;
    for(int i = 0; i < 100; i++) {
        cout << randoms[i] << " ";
    }
    cout << endl;
}

// Sort the array from greatest to smallest, then output it and display the menu.
void sortGreatToSmall(int randoms[]) {
    int temp;
    // iterate through each item
    for(int i = 0; i < 100; i++) {
        // iterate through every OTHER item
        for(int j = i+1; j < 100; j++) {
            if(randoms[i] < randoms[j]) {
                // swap them
                temp = randoms[i];
                randoms[i] = randoms[j];
                randoms[j] = temp;
            }
        }
    }
    
    output(randoms);
    displayMenu(randoms);
}

// Sort the array from small to greatest, then output it and display the menu.
void sortSmallToGreat(int randoms[]) {
    int temp;
    // iterate through each item
    for(int i = 0; i < 100; i++) {
        // iterate through every OTHER item
        for(int j = i+1; j < 100; j++) {
            if(randoms[i] > randoms[j]) {
                // swap them
                temp = randoms[i];
                randoms[i] = randoms[j];
                randoms[j] = temp;
            }
        }
    }
    
    output(randoms);
    displayMenu(randoms);
}